- saccharrata Reeve, 1859 = Mitrella tenuis (family Columbellidae – Atiliinae)

- saginata Marshall, 2001 = Acesta saginata (family Limidae)

- sagittata Menke, 1843 = Tanea sagittata (family Naticidae – Naticinae)

- salacon Iredale, 1929 = Parvamussium thetidis (family Propeamussiidae)

- sandvichensis Sowerby, 1869 = Aplysia juliana (family Aplysiidae – Aplysiinae)

- sanguinea Angas, 1864 = Madrella sanguinea (family Madrellidae)

- sanguinolenta Ponder & Yoo, 1980 = Eatonina sanguinolenta (family Cingulopsidae)

- sarmentosus Hedley & May, 1908 = Anatrophon sarmentosus (family Muricidae – Trophoninae)

- saturata Hutton, 1884 = Nerita atramentosa (family Neritidae – Neritinae)

- saulii ‘Wright’ sensu Hedley, 1898 = Bankia australis (family Teredinidae – Bankiinae)

- saulii Wright, 1866 = Nausitora saulii (family Teredinidae – Bankiinae)

- saundersi Cotton, 1945 = Conus anemone (family Conidae – Coninae)

- saxea Sowerby, 1896 = Austrodrillia saxea (family Turridae – Crassispirinae)

- scabra Leach, 1817 = Cranchia scabra (family Cranchiidae)

- scabra Reeve, 1856 = Siphonaria diemenensis (family Siphonariidae)

- scabrilirata Angas, 1865 = Notoacmea flammea (family Lottiidae – Lottiinae)

- scabriuscula Angas, 1867 = Herpetopoma scabriuscula (family Trochidae – Eucyclinae)

- scalariformis Tenison Woods, 1876 = Austromitra analogica (family Costellariidae)

- scalarina Cox, 1867 = Truncatella scalarina (family Truncatellidae – Truncatellinae)

- scalarina Henn & Brazier, 1894 = Turbonilla tasmanica (family Pyramidellidae – Turbonillinae)

- scalarina Lamarck, 1818 = Katelysia scalarina (family Veneridae – Tapetinae)

- scalaris emmae Reeve, 1846 = Haliotis scalaris emmae (family Haliotidae)

- scalaris A. Adams, 1854 = Muricopsis umbilicatus (family Muricidae – Muricopsinae)

- scalaris Menke, 1829 = Dicathais orbita (family Muricidae – Rapaninae)

- scalaris Philippi, 1847 = Lasaea australis (family Galeommatidae)

- scalpidens Watson, 1886 = Pyramidellidae unplaced scalpidens (family Pyramidellidae – Unplaced)

- scalpta Reeve, 1857 = Electroma scalpta (family Pteriidae)

- scapha Verco, 1908 = Exosiperna scapha (family Mytilidae)

- schomburghi Angas, 1878 = Austromitra analogica (family Costellariidae)

- schoutanica May, 1910 = Colubraria schoutanica (family Colubrariidae)

- schoutanica May, 1911 = Epidirona schoutanica (family Turridae – Crassispirinae)

- schoutanica May, 1912 = Mesoginella schoutanica (family Marginellidae – Marginellinae)

- schoutanica May, 1912 = Tasmatica schoutanica (family Naticidae – Naticinae)

- schoutanica May, 1913 = Attenuata schoutanica (family Rissoidae – Rissoinae)

- schoutanica May, 1915 = Melanella schoutanica (family Eulimidae)

- schoutenensis May, 1910 = Marita schoutenensis (family Conidae – Mangeliinae)

- schrayeri Philippi, 1850 = Phasianotrochus irisodontes (family Trochidae – Trochinae)

- scita Tenison Woods, 1876 = Austromitra analogica (family Costellariidae)

- scitula A. Adams, 1851 = Hedleytriphora scitula (family Triphoridae – Triphorinae)

- scitula Donald, 1900 = Colpospira quadrata (family Turritellidae – Turritellinae)

- sclateri Cox, 1869 = Amoria undulata (family Volutidae – Amoriinae)

- sculpta Hanley, 1845 = Dosinia sculpta (family Veneridae – Dosiniinae)

- sculpta Gatliff & Gabriel, 1913 = Retusa sculpta (family Retusidae)

- sculptilis Angas, 1871 = Asperdaphne sculptilis (family Conidae – Rhaphitominae)

- sculptilis May, 1919 = Alvania sculptilis (family Rissoidae – Rissoinae)

- sculptior Tenison Woods, 1879 = Asperdaphne sculptilior (family Conidae – Rhaphitominae)

- securis Lamarck, 1819 = Limnoperna securis (family Mytilidae)

- segmentatus Verco, 1909 = Apixystus segmentatus (family Muricidae – Trophoninae)

- segravei Gatliff, 1891 = Conus clarus (family Conidae – Coninae)

- segravei Gatliff, 1891 = Conus clarus (family Conidae – Coninae)

- segregata Powell, 1933 = Cabestana tabulata (family Ranellidae – Cymatiinae)

- semicinctus May, 1915 = Badepigrus semicinctus (family Anabathridae)

- semiconvexa Lamarck, 1822 = Mitrella semiconvexa (family Columbellidae – Atiliinae)

- semifossilis Sowerby, 1867 = Macomona deltoidalis (family Tellinidae – Tellininae)

- semigranosum Dunker, 1846 = Nassarius nigellus (family Nassariidae – Nassariinae)

- semigranosum Lamarck, 1822 = Semicassis semigranosum (family Tonnidae – Phaliinae)

- semilaevis Tenison Woods, 1877 = Zaclys semilaevis (family Newtoniellidae – Eumetulinae)

- seminodosa May, 1916 = Onoba australiae (family Rissoidae – Rissoinae)

- semiobliterata Deshayes, 1853 = Dosinia sculpta (family Veneridae – Dosiniinae)

- semisulcatus Sowerby, 1870 = Conus rutilus (family Conidae – Coninae)

- semivestita Tate, 1887 non Dunker, 1871 = Limnoperna inconstans (family Mytilidae)

- senhousia Benson in Cantor, 1842 = Musculista senhousia (family Mytilidae)

- septiformis auct. (non Quoy & Gaimard, 1834) = Notoacmea flammea (family Lottiidae – Lottiinae)

- sericea Reeve, 1850 = Dosinia caerulea (family Veneridae – Dosiniinae)

- serotinum A. Adams, 1855 = Ataxocerithium serotinum (family Newtoniellidae – Ataxocerithiinae)

- serrata Reeve, 1843 = Irus crenatus (family Veneridae – Tapetinae)

- serratum Baba, 1949 = Phyllodesmium serratum (family Facelinidae – Favorininae)

- sexcostata Tate, 1888 = Sassia sexcostata (family Ranellidae – Cymatiinae)

- sexdentata Pritchard & Gatliff, 1898 = Asperdaphne desalesii (family Conidae – Rhaphitominae)

- sheardi Cotton & Weeding, 1939 = Mucrosquama verconis (family Chitonidae – Chitoninae)

- shepherdi Ponder & Yoo, 1978 = Eatoniella shepherdi (family Eatoniellidae)

- shorehami Pritchard & Gatliff, 1899 = Cystiscus angasi (family Cystiscidae – Cystiscinae)

- shorehami Pritchard & Gatliff, 1900 = Tectonatica shorehami (family Naticidae – Naticinae)

- sica Cotton, 1957 = Alaginella vercoi (family Marginellidae – Marginellinae)

- siculus Vérany, 1851 = Ctenopteryx siculus (family Ctenopterygidae)

- siderea Angas, 1865 not Reeve, 1842 = Munditia tasmanica (family Liotiidae – Liotiinae)

- siennae Tenison Woods, 1877 = Cryptassiminea tasmanica (family Assimineidae – Assimineinae)

- simillima May, 1915 = Powellisetia simillima (family Rissoidae – Rissoinae)

- simlex A. Adams, 1856 non Deshayes, 1842 = Ennucula obliqua (family Nuculidae)

- simplex Angas, 1871 = Syrnola simplex (family Pyramidellidae – Syrnolinae)

- simplex Hedley, 1903 = Enatimene simplex (family Muricidae – Trophoninae)

- simplex Laseron, 1955 = Pepta simplex (family Cancellariidae – Cancellariinae)

- simplex Laseron, 1957 = Gibberula subbulbosa (family Cystiscidae – Persiculinae)

- simplex Reeve, 1865 = Mesoginella olivella (family Marginellidae – Marginellinae)

- simplicosta Ponder & Yoo, 1976 = Pisinna tumida (family Anabathridae)

- simsoni Tate & May, 1900 = Cystiscus angasi (family Cystiscidae – Cystiscinae)

- simsoni Tate & May, 1900 = Epigrus cylindraceus (family Epigridae)

- simsoni Tenison Woods, 1876 = Fossarina petterdi (family Trochidae – Trochinae)

- simsoni Tenison Woods, 1876 = Turbo undulatus (family Turbinidae – Turbininae)

- simulata Marshall, 1983 = Isotriphora simulata (family Triphoridae – Triphorinae)

- singletoni Cotton, 1945 = Conus anemone (family Conidae – Coninae)

- sinicum Gmelin, 1791 = Umbraculum umbraculum (family Umbraculidae)

- sinuata Cotton & Godfrey, 1938 = Ostrea angasi (family Ostreidae – Ostreinae)

- sinuata Reeve, 1865 = Mesoginella strangei (family Marginellidae – Marginellinae)

- sinusigera Laseron, 1951 = Mitra badia (family Mitridae – Mitrinae)

- sipho Lamarck, 1818 = Serpulorbis sipho (family Vermetidae – Vermetinae)

- smaltata Fischer, 1879 = Cantharidella balteata (family Trochidae – Trochinae)

- smaragdinus Angas, 1867 = Ischnochiton smaragdinus (family Ischnochitonidae – Ischnochitoninae)

- smaragdinus Baba, 1949 = Stiliger smaragdinus (family Limapontiidae)

- smithi Angas, 1867 = Rissoina fasciata (family Rissoidae – Rissoininae)

- smithi Angas, 1877 = Anachis smithi (family Columbellidae – Atiliinae)

- smithi Angas, 1877 = Conus rutilus (family Conidae – Coninae)

- smithi Wood, 1828 = Clanculus undatus (family Trochidae – Trochinae)

- smithii Gray, 1853 = Paphies cuneata (family Mesodesmatidae – Mesodesmatinae)

- solida Angas, 1877 = Marikellia solida (family Galeommatidae)

- solida Blainville, 1825 = Cellana solida (family Nacellidae)

- solida Cotton, 1931 = Ovacuna atkinsoni (family Condylocardiidae – Cuninae)

- solida von Martens, 1878 = Phallomedusa solida (family Phallomedusidae)

- solidus May, 1910 = Aesopus solidus (family Columbellidae – Atiliinae)

- sophiae Henn & Brazier, 1894 = Crassitoniella flammea (family Eatoniellidae)

- sordida Pease, 1871 = Dendrodoris nigra (family Dendrodorididae)

- sordida Swainson, 1821 = Polinices sordida (family Naticidae – Naticinae)

- sordida Tate, 1891 = Tucetona sordida (family Glycymerididae)

- sowerbyi Kiener, 1839 = Ericusa sowerbyi (family Volutidae – Cymbiinae)

- sowerbyi Pilsbry, 1892 = Ischnochiton fruticosus (family Ischnochitonidae – Ischnochitoninae)

- spathula Hedley, 1915 = Poroleda spathula (family Nuculanidae – Nuculaninae)

- speciosa Angas, 1871 = Phyllocoma speciosa (family Muricidae – Muricinae)

- speciosa H. Adams, 1861 = Notoplax speciosa (family Acanthochitonidae – Acanthochitoninae)

- spectabilis Iredale, 1929 = Semicassis pyrum (family Tonnidae – Phaliinae)

- spectandus Iredale & McMichael, 1962 = Penion mandarinus (family Buccinidae – Siphonaliinae)

- spectata Iredale, 1929 = Lima nimbifer (family Limidae)

- spengleri Perry, 1811 = Cabestana spengleri (family Ranellidae – Cymatiinae)

- sphaerula Mighels, 1845 = Niveria globosa (family Triviidae)

- sphaerula Mighels, 1845 = Niveria globosa (family Triviidae)

- spica Hedley, 1907 = Exomilopsis spica (family Columbellidae – Atiliinae)

- spica Verco, 1909 = Teretriphora spica (family Triphoridae – Triphorinae)

- spiceri Tenison Woods, 1876 = Dolicholatirus spiceri (family Fasciolariidae – Peristerniinae)

- spina Crosse & Fischer, 1864 = Cingulina spina (family Pyramidellidae – Turbonillinae)

- spina Verco, 1909 = Inella spina (family Triphoridae – Triphorinae)

- spinosa Tenison Woods, 1877 = Cyclostrema spinosa (family Turbinidae – Skeneinae)

- spirata Lamarck, 1822 = Cancellaria spirata (family Cancellariidae – Cancellariinae)

- spirula Linnaeus, 1758 = Spirula spirula (family Spirulidae)

- splendidulus Swainson, 1840 = Phasianotrochus eximius (family Trochidae – Trochinae)

- splendidus Reeve, 1863 = Astele rubiginosum (family Calliostomatidae – Calliostomatinae)

- spongialis Ashby, 1923 = Notoplax speciosa (family Acanthochitonidae – Acanthochitoninae)

- spongiarum Lamarck, 1819 = Vulsella spongiarum (family Malleidae)

- spretus Tate & May, 1900 = Gadila spretus (family Gadilidae)

- squamifera Reeve, 1855 = Scutellastra peronii (family Patellidae)

- squamiferum Koch, 1844 = Astralium squamiferum (family Turbinidae – Turbininae)

- squamiferus Gould, 1852 = Bembicium melanostoma (family Littorinidae – Lacuninae)

- squamosa Lamarck, 1819 = Barbatia reticulata (family Arcidae – Arcinae)

- squamosissima Tenison Woods, 1879 = Bedeva paivae (family Muricidae – Ergalataxinae)

- stadiale Hedley, 1914 = Semicassis pyrum (family Tonnidae – Phaliinae)

- staminea Basedow & Hedley, 1905 = Doriopsilla peculiaris (family Dendrodorididae)

- stanislas Tenison Woods, 1877 = Serrata mustelina (family Marginellidae – Marginellinae)

- stclarae Tenison Woods, 1876 = Alaba monile (family Litiopidae)

- st-gallae Tenison Woods, 1876 = Guraleus incrustus (family Conidae – Mangeliinae)

- stokesi Cotton, 1961 = Ericusa sowerbyi (family Volutidae – Cymbiinae)

- stolata Iredale, 1930 = Notocorbula stolata (family Corbulidae – Corbulinae)

- stowae Verco, 1906 = Pugillaria stowae (family Siphonariidae)

- stowei Hutton, 1873 = Pododesmus zelandicus (family Anomiidae – Placunanomiinae)

- strangei A. Adams, 1852 = Humphreyia strangei (family Clavagellidae)

- strangei A. Adams, 1856 = Ennucula obliqua (family Nuculidae)

- strangei Angas, 1867 = Domiporta strangei (family Mitridae – Mitrinae)

- strangei Brazier, 1894 = Alvania strangei (family Rissoidae – Rissoinae)

- strangei Reeve, 1855 = Polinices sordida (family Naticidae – Naticinae)

- strangei Sowerby, 1872 = Limatula strangei (family Limidae)

- striata Deshayes, 1855 = Gari livida (family Psammobiidae)

- striata Lamarck, 1819 = Cryptoplax striata (family Cryptoplacidae)

- striata Reeve, 1842 = Coxiella striata (family Pomatiopsidae – Pomatiopsinae)

- striatissima Sowerby, 1853 = Timoclea cardioides (family Veneridae – Chioninae)

- striatularis Lamarck, 1819 = Glycymeris striatularis (family Glycymerididae)

- striatum Hutton, 1873 = Amygdalum striatum (family Mytilidae)

- stricta Hedley, 1907 = Pepta stricta (family Cancellariidae – Cancellariinae)

- strigata Reeve, 1859 = Mitrella semiconvexa (family Columbellidae – Atiliinae)

- strigosa A. Adams, 1850 = Stomatella impertusa (family Trochidae – Stomatellinae)

- strigosa Lamarck, 1818 = Katelysia scalarina (family Veneridae – Tapetinae)

- striolata Carpenter, 1857 = Janthina janthina (family Janthinidae)

- studderti Fukuda & Ponder, 2006 = Conassiminea studderti (family Assimineidae – Assimineinae)

- subalata Gatliff & Gabriel, 1910 = Anisodonta subalata (family Sportellidae)

- subalbida Gatliff & Gabriel, 1914 = Myadora albida (family Myochamidae)

- subantarctica Hedley, 1916 = Zygochlamys delicatula (family Pectinidae – Chlamydinae)

- subauriculatus May, 1916 = Cystiscus subauriculatus (family Cystiscidae – Cystiscinae)

- subbulbosa Tate, 1878 = Gibberula subbulbosa (family Cystiscidae – Persiculinae)

- subcarinatum Swainson, 1855 = Astele subcarinatum (family Calliostomatidae – Calliostomatinae)

- subcarnea Beddome, 1896 = Notocypraea subcarnea (family Cypraeidae – Pustulariinae)

- subcostata Tenison Woods, 1878 = Notocochlis subcostata (family Naticidae – Naticinae)

- subdecussata Deshayes, 1853 = Irus griseus (family Veneridae – Tapetinae)

- subdistorta Lamarck, 1822 = Sassia subdistorta (family Ranellidae – Cymatiinae)

- subemarginata Blainville, 1819 = Hemitoma subemarginata (family Fissurellidae – Emarginulinae)

- sublateralis E. A. Smith, 1884 = Felaniella sublateralis (family Ungulinidae)

- submarmorata Pilsbry, 1891 = Patelloida latistrigata (family Lottiidae – Patelloidinae)

- subplicata Cotton, 1952 = Terebra tristis (family Terebridae – Terebrinae)

- subpurpurea May, 1923 = Micromytilus crenatuliferus (family Philobryidae)

- subquadrata Tenison Woods, 1878 = Munditia subquadrata (family Liotiidae – Liotiinae)

- subradiata Tate, 1889 = Cunanax subradiata (family Condylocardiidae – Condylocardiinae)

- subreticulata Laseron, 1950 = Alvania suprasculpta (family Rissoidae – Rissoinae)

- subreticulata Tate, 1888 = Phycothais reticulata (family Muricidae – Rapaninae)

- subspeciosa Iredale & Hull, 1925 = Notoplax addenda (family Acanthochitonidae – Acanthochitoninae)

- subsquamosa Dunker, 1871 = Gazameda tasmanica (family Turritellidae – Turritellinae)

- subtrigona Cox, 1883 = Saccostrea cucullata glomerata (family Ostreidae – Crassostreinae)

- subundulata Angas, 1865 = Notoacmea flammea (family Lottiidae – Lottiinae)

- subundulata auct. (non Angas, 1865) = Notoacmea alta (family Lottiidae – Lottiinae)

- subviridis Iredale & May, 1916 = Ischnochiton subviridis (family Ischnochitonidae – Ischnochitoninae)

- subviridis May, 1910 = Splendrillia subviridis (family Drillidae)

- succincta Lamarck, 1816 = Dicathais orbita (family Muricidae – Rapaninae)

- sueurii Blainville, 1825 = Acanthochitona sueurii (family Acanthochitonidae – Acanthochitoninae)

- sulcata Fischer, 1883 = Oocorys sulcata (family Tonnidae – Oocorythinae)

- sulcata Lamarck, 1818 = Serpulorbis sipho (family Vermetidae – Vermetinae)

- sulcatus Cotton, 1944 = Botelloides sulcatus (family Trochidae – Halistylinae)

- sulcosa A. Adams, 1851 = Prothalotia lehmanni (family Trochidae – Trochinae)

- sulphurea Rudman, 1986 = Noumea sulphurea (family Chromodorididae)

- superba Hedley, 1906 = Emarginula superba (family Fissurellidae – Emarginulinae)

- superciliosus Quoy & Gaimard, 1832 = Octopus superciliosus (family Octopodidae – Octopodinae)

- supracostata May, 1919 = Onoba supracostata (family Rissoidae – Rissoinae)

- suprasculpta May, 1915 = Alvania suprasculpta (family Rissoidae – Rissoinae)

- suprasculpta Tenison Woods, 1878 = Miralda suprasculpta (family Pyramidellidae – Odostomiinae)

- susonis Tenison Woods, 1877 = Cirsonella weldii (family Turbinidae – Skeneinae)

- suturalis A. Adams, 1853 = Diala suturalis (family Dialidae)

- sydneyensis Sowerby, 1869 = Aplysia sydneyensis (family Aplysiidae – Aplysiinae)

- syringianus Hedley, 1903 = Siphonochelus syringianus (family Muricidae – Typhinae)